摘要: numpy.array插入一行或一列 import numpy as np a = np.array([[1,2,3],[4,5,6],[7,8,9]]) b = np.array([[0,0,0]]) c = np.insert(a, 0, values=b, axis=0) d = np.ins 阅读全文
posted @ 2019-11-21 10:29 wqbin 阅读(12020) 评论(0) 推荐(0)
摘要: 问题 1. 将DataFrame数据保存到mysql后,添加索引出现错误提示: BLOB/TEXT column used in key specification without a key length 2. mysql> CREATE INDEX credit_creditchannel_pa 阅读全文
posted @ 2019-11-21 10:13 wqbin 阅读(3073) 评论(0) 推荐(0)